Tight joint for pipings



Aug; 22, 1933.-

o. BIHET TIGHT JOINT FOR PIPINGS Fi led Jan; 2, 1932 2 Sheets-Sheet 1luveu'rok OSCAR BIHET by his aiz'vrnegm Filed Jan. 2, 1932 2Sheets-Sheet 2 'mvsm'ba QSCAQ BIHET Patented Aug. 22, 1933 uiu'raliSTATES' 1,924,020 TIGHT JOINT FOR rrruvos Oscar Bihet, Flemalle Haute,Belgium Application January 2, 1932, Serial it... 584,543 and in BelgiumJune 11, 1931 a z Claims. (01. 285-163) My invention relates to a jointfor pipes .of underground or other pipings for gas, water, air or thelike, and also for the connection of pipings,

' fittings and the like.

The object of the invention is to ensure thetightness of pipings.assembled by sleeve joints or spigot and socket joints, both as regardsinternal and/or external pressure.

In drinking water pipe-lines namely, it is 'most important to preventthe penetration in the piping of noxious liquids which can at any timebepresent in the soil and would thus defile the water intended fordrinking.

Another advantage of the joint according to this invention lies in thegreat simplicity and rapidity of assembling, whichrequires no train-.ing of the workmen ,and canbe performed by any labourer.

This joint is based on the strong compression of a resilient materialbetween the walls of a suit- .ably dimensioned and shaped housingnianaged either in a coupling sleeve or in the interior of a reinforcedend of the pipe, and the outside. sur-' face of one end of another pipe.I

Owing to such strong compression, the resilient material completelyfills all the interstices and opposes to any pressure either from insideor from outside.

Opposite to some known joints, the tightness 0 which is ensured by theinternal pressure of the fluid, the joint according to this. inventionensures the same tightness under low or high pres-,

sures, even in the case of pressures lower than atmospheric pressure inthe interior of the piping.

- Being held in a groove of suitable size, it is not deformable.

During the introduction of the spigot end oi.-

trates a socket pipe in which thejoint is placed in its housing previousto the introduction of the spigot pipe. Fig. 2 shows the same socketpipe .with the joint pressed in by the spigot pipe. Fig.

3 illustrates the same two phases of the opera- 'tion whenusing aconnection sleeve. Fig. 4 illustrates a joint in working position in aspigot and socketassernbly when it is not possible to out the wall Q ofthe groove.

The pipe can slide in the sleeve or socket with-.

grooves in the socket; Fig. 5 shows the joint as used with-a sleeveconnection in the same case.

' Description- In one-reinforced end of the pipe, Figs. 1 and 2, or ateach end of a sleeve Fig. 3, is cutout a groove C, having the same sizeas the outside of the joint. The joint proper, made of a resilientmaterial, such as rubber or the like, is of H shaped section. In theillustration of the cross section 5 of the joint, the horizontal bar ofthe H is parallel with the axis of the assembled pipes.

The groove J has been so designed as to produce two lips K which, bytheir resiliency, will assume the shape of the groove 0 and adhereperfectly to its walls.

The lips L and M are of such a length that theycan be compressed betweenthe inside walls of the sleeve or socket of one pipe and the exteriorsurfaceof anotherpipe (generally known as spigot 7 pipe or male pipe) Abevel P is cut out of the lip L in order to facilitate the insertion ofthe spigot pipe and avoid the tearing of the joint of! The joint isshown in its'working position in Figs. 2 and 3.

When fitting the pipes, the spigot or male end first presses on thejoint in F (Figs. 1 and 3) and forces thelip L upwards,,to be compressedbe- .In its forward motion the pipe lifts up the lip M, which fills thehollow space 0, and becomes compressed between the walls of said hollowand the external surface of the spigot pipe.

The Figs. 2 and 3 clearly illustrate the position in working order. Thejoint being compressed in every direction, adheres to the walls Q, S, T,V and to the external surface of the spigot end.

In sleeve connected pipings, two joints are arranged in grooves Cmanaged'in the sleeve. The part A, on the left hand of Figure 3,illustrates the joint before the introduction of the pipe in the sleeve.The part B, on the right hand, illustrates the working of the joint. Theprinciple is the 1 same as for spigot and socket'joints.

v Uses of this type of joint The joint H can be used for pipes and tubesof every description.

Cast pipes are generally made with a reinforced end, the inside diameterof which allowsthe introduction of the spigot end; 1

The type of joint illustrated in Figs. 1 and 2 shouidbeusedinthiscase. I

steebpipes are generally produced-by rolling- .fastened in any othersuitable way.

and have also a reinforced end. This end is used for the location of thejoint H as shown in Figs. 1 and 2. It is then sufiicient to expand thereinforced end in order to form a socket, and to manage in same thegroove C.

Pipes made of any other material can also be provided in some cases,with a reinforced end which permits the location of the jointillustrated in Figs. 1 and 2. 1

When the pipes or tubes have straight ends, i. e. when their ends are ofthe same diameter and thickness as their body and do not allow themilling of a groove C, the type with union sleeve,

illustrated in Fig. 3, can be used.

In cases when, for any reason, it is not possible to mill grooves in thesocket or sleeve, the arrangeproducing grooves C in which the resilientjoints.

H shall be placed.

With steel pipes, said rings can be welded or With cast iron or othercast pipes, the rings may be cast with the pipes or fastened in anysuitable way.

This arrangement/when duplicated, i. e. with two joints at every end ofthe pipe, is of great efliciency for meeting large expansion, as itenables of maintaining the required alinement and joint H ensurescomplete tightness in the same manner as in the cases illustrated inFigs. 1, 2, and 3, owing to the lips L and M being bent and stronglycompressed between the inside wallsof- 1. In a pipe conduit in which theend of one pipe member enters theend of another pipe member, a couplingfor making a tight joint between the outer surface of theinner memberand the inner surface of the outer member, comprising an annular ring ofH section received in an annular groove in one of said surfaces, theflanges which project out of the groove being spaced apart a-distancedetermined by the length of the first flange whereby said first flangefills the space therebetween, and said first flange being of sufficientwidth to cause compression of both said first flange and theresilientmaterial onto.

which it is bent.

2. A tight joint for conduits of pipes, compris-Q ing a ring ofresilient material having a section in the form of a letter H placedperpendicularly to the axis of the pipes to be assembled, and

lodged in a groove formed in one of the matingsurfaces of said pipes,whereby upon the introduction of the inner pipe end into the outer pipeend, the first flange extending from said ring bends'to lie compressedbetween the second, the bridge of the H section and the other matingsurface, and the second flange extendingfrom said' ring bends to liecompressed between said other mating surface and the wall of saidgroove, thereby rendering thejoint tight against internal or externalpressures of various degrees by not only the bending but also thecompression of said flanges between the mating surfaces of said pipes.

OSCAR BIHET.

